국내 최대 기계 및 로봇 연구정보

국내학술지

287

국내학술지 제목 게시판 내용
제목(국문)	선회형 이유체노즐의 노즐캡 형상에 따른 분무특성
제목(영문)	Effect of Nozzle Cap Geometry for Swirl-Type Two-Fluid Nozzle on the Spray Characteristics
저자	최윤준 (Y. J. Choi ,전북대학교 ) ▷공저자네트워크등록하기 강신명 (S. M. Kang ,전북대학교 ) ▷공저자 네트워크 보기 김덕진 (D. J. Kim ,자동차부품연구원 ) ▷공저자 네트워크 보기 이지근 (J. K. Lee ,전북대학교 ) ▷공저자네트워크등록하기
초록	In the case of heavy duty diesel engines, the Urea-SCR system is currently considered to reduce the NOx emission as a proved technology, and it is widely studied to get the high performance and durability. However, the nozzles to inject the urea-water solution into the exhaust pipe occur some problems, including the nozzle clogging, deposition of urea-water solution on the inner wall of the exhaust pipe, resulting in the production of urea salt. In this study, a swirl-type twin-fluid nozzle to produce more fine droplets was used as a method to solve the problems. The effect of the nozzle cap geometry, including the length to diameter ratio (l,/do) and chamfer, on the spray characteristics were investigated experimentally. The length to diameter ratio of nozzle cap were varied from 0.25 to 1.125. The chamfer angle of the nozzle cap was constant at 90°. The mean velocity and droplet size distributions of the spray were measured using a 2-D PDA (phase Doppler analyzer) system, and the spray half-width, AMD (arithmetic mean diameter) and SMD (Sauter mean diameter) were analyzed. At result, The larger length to diameter ratio of nozzle cap were more small SMD and AMD. The effect of the chamfer did increase the radial velocity, while it did not affect the atomization effect.
keyword	Two-fluid nozzle(이유체노즐), Geometry ratio(형상비), Urea-SCR(우레아-선택적촉매저감법), PDA system(위상도플러입자분석기)
저널명	한국액체미립화학회지 ▷관련저널보기
VOL	13
PAGE	134-148
발표년도	2008
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